中文
含义
长虹空调检测到 IPM（智能功率模块）保护触发，显示屏显示 F1 错误代码。IPM 是变频空调驱动板的核心功率器件，集成了 IGBT 功率管和驱动保护电路，负责将直流电转换为三相交流电驱动压缩机。IPM 保护触发意味着模块检测到过流、过热、欠压或短路等异常状态，是变频空调最严重的硬件故障之一。
常见原因
- 压缩机内部绕组短路或绝缘击穿，导致流过 IPM 的电流瞬间飙升触发过流保护。
- IPM 模块自身因长期高温运行导致结温超标、内部损坏或键合线熔断。
- IPM 散热片与模块之间的导热硅脂干涸，散热不良导致 IPM 过热保护。
- 室外机主板上直流母线滤波电容失效，导致母线电压纹波过大，IPM 工作不稳定。
- 压缩机连接线相间短路或对地短路，导致 IPM 输出端过流。
- 电网电压波动过大或瞬时浪涌，导致 IPM 过压或欠压保护动作。
自助排查
- 立即停止空调运行并断开电源，等待至少 30 分钟让系统完全冷却和放电。
- 检查室外机对应电闸是否跳闸——如合闸后再次跳闸，说明驱动板或压缩机存在严重短路。
- 检查室外机安装位置散热条件：清理冷凝器翅片灰尘，确保周围通风良好。
- 待空调彻底冷却后重新通电试机，观察 F1 是否在启动瞬间立即触发——启动瞬发通常是压缩机或 IPM 短路；运行片刻后触发则更可能是散热不良或模块老化。
- IPM 模块故障涉及高压直流电路和精密功率器件维修，非专业人员操作极度危险。请联系长虹空调售后服务中心，由专业技师使用绝缘测试仪检测压缩机绕组，使用示波器测量 IPM 驱动波形，判断故障源并更换驱动板或压缩机。
English
Meaning
The Changhong air conditioner has detected that IPM (Intelligent Power Module) protection has been triggered, displaying the F1 error code. The IPM is the core power device on the inverter AC driver board, integrating IGBT power transistors and drive protection circuits. It converts DC power into three-phase AC to drive the compressor. IPM protection being triggered means the module has detected an abnormal condition such as overcurrent, overtemperature, undervoltage, or short circuit. This is one of the most serious hardware faults in inverter air conditioners.
Common Causes
- Internal winding short circuit or insulation breakdown in the compressor, causing an instantaneous current surge through the IPM that triggers overcurrent protection.
- The IPM module itself has exceeded junction temperature limits due to prolonged high-temperature operation, suffered internal damage, or experienced bond wire fusing.
- The thermal paste between the IPM and its heatsink has dried out, causing poor heat dissipation and IPM overtemperature protection.
- The DC bus filter capacitor on the outdoor unit main board has failed, causing excessive bus voltage ripple and unstable IPM operation.
- Phase-to-phase or phase-to-ground short circuits in the compressor connecting wires, causing IPM output overcurrent.
- Severe grid voltage fluctuations or transient surges causing IPM overvoltage or undervoltage protection to activate.
Self-Check Steps
- Immediately stop the AC and disconnect power. Wait at least 30 minutes for the system to cool down and discharge completely.
- Check whether the outdoor unit’s circuit breaker has tripped — if it trips again after resetting, there is a serious short circuit in the driver board or compressor.
- Check the outdoor unit installation’s cooling conditions: clean dust from the condenser fins and ensure adequate ventilation around the unit.
- After the AC has cooled down completely, reconnect power and test. Observe whether F1 triggers immediately at startup — instant triggering usually indicates an IPM or compressor short circuit; triggering after running for a while more likely points to poor heat dissipation or module aging.
- IPM module faults involve high-voltage DC circuits and precision power device repair — operation by non-professionals is extremely dangerous. Contact Changhong AC after-sales service for a professional technician to test compressor windings with an insulation tester, measure IPM drive waveforms with an oscilloscope, determine the fault source, and replace the driver board or compressor as needed.